Platinum-nanocomposite gels

Clay-Mediated Platinum-Nanocomposite Gels (Pt-NC Gels). 234... 

By extending the synthetic technology of NC gels, novel nanohybrid materials such as new stimuli-responsive NC gels (non-PNlPA systems), zwitterionic NC gels, aqueous dispersions of polymer-clay nanocomposite microspheres, Pt-NC gels with clay-mediated platinum nanoparticles, and soft hydrophobic polymer nanocomposites have been developed, as described below. 

A disposable amperometric immunosensor was also developed for sensitive detection of chlorpyrifos-methyl, a persistent insecticide widely used in farming and horticulture. The device was fabricated by modiflcation of the screen-printed carbon electrodes with nanocomposites made by skillful doping of bovine serum albumin conjugated chlorpyrifos-methyl and platinum colloid into silica sol-gel. The immobilization of BSA-Ag conjugates on the nanocomposite retained their immunoactivities, which allowed the immobilized BSA-Ag to effectively capture unbound Ab-HRP in the detection solution. A linear response to chlorpyrifos-methyl concentration ranging from 0.4 to 20 ng/ml was reported and good results were obtained for the detection of the insecticide in treated soil and grape samples [53]. 

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